Regression of build 2.5.0 library with recent Core 3.3.11 for ESP32-C5 target

NimBLE 2.5.0 build of a sketch for C5 is fine with Core 3.3.10

However, with Core 3.3.11 it gives a failure upon linking stage :

/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gatts.c.o: in function `ble_gatts_connection_broken':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gatts.c:1574:(.text.ble_gatts_connection_broken+0x6c): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gatts.c.o: in function `ble_gatts_start':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gatts.c:1744:(.text.ble_gatts_start+0xb2): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gatts.c:1745:(.text.ble_gatts_start+0xc0): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gatts.c.o: in function `ble_gatts_conn_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gatts.c:1855:(.text.ble_gatts_conn_init+0x1e): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_prep_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:2533:(.text.ble_att_svr_prep_free+0x1c): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_entry_alloc':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:75:(.text.ble_att_svr_register+0x24): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_rx_prep_write':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:2843:(.text.ble_att_svr_rx_prep_write+0xca): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_entry_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:100:(.text.ble_att_svr_reset+0x46): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:100:(.text.ble_att_svr_reset+0x5c): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_start':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:3287:(.text.ble_att_svr_start+0x4a): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_att_svr.c.o: in function `ble_att_svr_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_att_svr.c:3315:(.text.ble_att_svr_init+0x22): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gap.c.o: in function `ble_gap_update_entry_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gap.c:7718:(.text.ble_gap_update_entry_free+0xc): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gap.c.o: in function `ble_gap_update_params':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gap.c:7996:(.text.ble_gap_update_params+0xa0): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gap.c.o: in function `ble_gap_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gap.c:9045:(.text.ble_gap_init+0xb0): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gattc.c.o: in function `ble_gattc_proc_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gattc.c:778:(.text.ble_gattc_proc_free+0x54): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gattc.c.o: in function `ble_gattc_proc_alloc':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gattc.c:722:(.text.ble_gattc_proc_alloc+0xe): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_gattc.c.o: in function `ble_gattc_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_gattc.c:5412:(.text.ble_gattc_init+0x2c): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs.c.o: in function `ble_hs_event_rx_hci_ev':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs.c:549:(.text.ble_hs_event_rx_hci_ev+0x2e): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs.c.o: in function `ble_hs_enqueue_hci_event':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs.c:611:(.text.ble_hs_enqueue_hci_event+0x12): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs.c.o: in function `ble_hs_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs.c:784:(.text.ble_hs_init+0x24): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs_conn.c.o: in function `ble_hs_conn_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs_conn.c:262:(.text.ble_hs_conn_free+0x32): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs_conn.c.o: in function `ble_hs_conn_alloc':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs_conn.c:152:(.text.ble_hs_conn_alloc+0x12): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_hs_conn.c.o: in function `ble_hs_conn_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_hs_conn.c:581:(.text.ble_hs_conn_init+0x22): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap.c.o: in function `ble_l2cap_chan_alloc':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap.c:61:(.text.ble_l2cap_chan_alloc+0x12): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap.c.o: in function `ble_l2cap_chan_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap.c:89:(.text.ble_l2cap_chan_free+0x1c): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap.c.o: in function `ble_l2cap_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap.c:507:(.text.ble_l2cap_init+0x20): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap_sig.c.o: in function `ble_l2cap_sig_proc_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap_sig.c:1866:(.text.ble_l2cap_sig_proc_free+0xc): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap_sig.c.o: in function `ble_l2cap_sig_update':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap_sig.c:560:(.text.ble_l2cap_sig_update+0x52): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_l2cap_sig.c.o: in function `ble_l2cap_sig_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_l2cap_sig.c:2018:(.text.ble_l2cap_sig_init+0x2a): undefined reference to `r_os_mempool_init'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_sm.c.o: in function `ble_sm_proc_alloc':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_sm.c:400:(.text.ble_sm_proc_alloc+0xe): undefined reference to `r_os_memblock_get'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_sm.c.o: in function `ble_sm_proc_free':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_sm.c:2401:(.text.ble_sm_proc_free+0xa): undefined reference to `r_os_memblock_put'
/home/codespace/.arduino15/packages/esp32/tools/esp-rv32/2601/bin/../lib/gcc/riscv32-esp-elf/14.2.0/../../../../riscv32-esp-elf/bin/ld: /tmp/arduino/libraries/NimBLE-Arduino-2.5.0/nimble/nimble/host/src/ble_sm.c.o: in function `ble_sm_init':
/home/codespace/Arduino/libraries/NimBLE-Arduino-2.5.0/src/nimble/nimble/host/src/ble_sm.c:3095:(.text.ble_sm_init+0x30): undefined reference to `r_os_mempool_init'
collect2: error: ld returned 1 exit status

To reproduce

$ arduino-cli core install esp32:esp32@3.3.11
$ export BOARD=esp32:esp32:esp32c5:PartitionScheme=huge_ap
$ arduino-cli  compile -v --build-path=/tmp/arduino -b "$BOARD" NimBLE-Arduino-2.5.0/examples/NimBLE_Client/NimBLE_Client.ino

Having the same/similar issue with C6 target. Idf 5.5.5 appears to have renamed some important functions:

IDF 5.5.5 dropped the r_ prefix on the mempool family. os_mempool_init/os_memblock_get/os_memblock_put now live in libbt.a; r_os_mempool_init is defined nowhere in the C6 blobs

So linking fails. Can manually override the links but unclear if that is safe...

Thanks for reporting this, looks like the definitions will need to be remade.

Fix and release incoming shortly.

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Regression of build 2.5.0 library with recent Core 3.3.11 for ESP32-C5 target #1174

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Regression of build 2.5.0 library with recent Core 3.3.11 for ESP32-C5 target #1174

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davelee98 commented on Jul 25, 2026

h2zero commented on Jul 25, 2026

h2zero commented on Jul 29, 2026

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